Java陷阱之ROUND_HALF_EVEN

double d=39.555;
BigDecimal bd = new BigDecimal(d);

System.out.println(bd.toString());
BigDecimal bd1 = bd.setScale(2, BigDecimal.ROUND_HALF_EVEN);
System.out.println(bd1.doubleValue()); 

结果：
IWAV0055I Java Bean test.TestA started with the main method
39.55499999999999971578290569595992565155029296875
39.55


以后要用BigDecimal.valueOf(double d)了。。。。。

 

 

详见：